如图,AB是圆O的直径,C是弧BD的中点,CE垂直AB垂足为E,BD交CE于点F(1)求证CF=BF2)若AD=2,圆O的半径为3,求BC的长
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![如图,AB是圆O的直径,C是弧BD的中点,CE垂直AB垂足为E,BD交CE于点F(1)求证CF=BF2)若AD=2,圆O的半径为3,求BC的长](/uploads/image/z/8804095-7-5.jpg?t=%E5%A6%82%E5%9B%BE%2CAB%E6%98%AF%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%2CC%E6%98%AF%E5%BC%A7BD%E7%9A%84%E4%B8%AD%E7%82%B9%2CCE%E5%9E%82%E7%9B%B4AB%E5%9E%82%E8%B6%B3%E4%B8%BAE%2CBD%E4%BA%A4CE%E4%BA%8E%E7%82%B9F%281%29%E6%B1%82%E8%AF%81CF%3DBF2%29%E8%8B%A5AD%3D2%2C%E5%9C%86O%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA3%2C%E6%B1%82BC%E7%9A%84%E9%95%BF)
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